[PATCH] Remove invalid macro starting with _ from libfdt_env.h

[Jon Loeliger]

> libfdt_env.h in the device tree compiler currently defines a _B() macro. This is in the
> namespace reserved for the implementation, and Cygwin's ctype.h actually defines a macro
> with this name. This renames _B to EXTRACT_BYTE.
> 
> Signed-off-by: Bert Kenward <bert.kenward at broadcom.com>

Applied.

Thanks,
jdl